tree 0fc98c127a5ee3acb007b13ed1687cbcf37e19aa
parent c6fcb2dbf98596caad8f56c0c398c1c6ff1fcff9
author Matthias Frei <matthias.frei@inf.ethz.ch> 1627455248 +0000
committer Ian Lance Taylor <iant@golang.org> 1628187724 +0000

internal/socket: support MSG_DONTWAIT

Explicitly handle MSG_DONTWAIT in read and send calls on platforms where this is defined, to get the per-call non-blocking behavior as would be expected when calling readmsg/sendmsg in C.
When MSG_DONTWAIT is set, we always return true from the function passed to syscall.RawConn.Read/Write, to avoid entering the polling state.

Fixes golang/go#46891

Change-Id: I4809577477554db1c45b6f4825a03d98208199d7
GitHub-Last-Rev: 4022e9b52c4375536e23162a88e5aa4d5637f134
GitHub-Pull-Request: golang/net#108
Reviewed-on: https://go-review.googlesource.com/c/net/+/333469
Run-TryBot: Ian Lance Taylor <iant@golang.org>
Run-TryBot: Damien Neil <dneil@google.com>
Reviewed-by: Ian Lance Taylor <iant@golang.org>
Reviewed-by: Damien Neil <dneil@google.com>
Trust: Damien Neil <dneil@google.com>